class Settings():
    def __init__(self):
        """初始化游戏的设置"""
        #屏幕设置
        self.screen_width = 800
        self.screen_height = 500
        self.bg_color = (230,230,230)

        """子弹的数值"""
        self.bullet_width = 650
        self.bullet_height = 650
        self.bullet_color =  60, 60, 60
        self.bullet_allowed = 3

        """外星人设置"""
        self.fleet_drop_speed = 10

        """飞船设置"""
        self.ship_limit = 3

        #以什么样的速度加快游戏节奏
        self.speedup_scale = 1.1

        #外星人点数的提高速度
        self.score_scale = 1.5

        self.initialize_dynamic_settings()

    def initialize_dynamic_settings(self):
        """初始化随游戏进行而变化的设置"""
        self.ship_speed_factor = 1.5
        self.bullet_speed_factor = 3
        self.alien_speed_factor = 1

        #fleet_direction为1表示向右移动，为-1表示向左移动
        self.fleet_direction = 1

        #记分
        self.alien_points = 50

    def increase_speed(self):
        """提高速度设置"""
        self.ship_speed_factor *= self.speedup_scale
        self.bullet_speed_factor *= self.speedup_scale
        self.alien_speed_factor *= self.speedup_scale
        self.alien_points = int(self.alien_points * self.score_scale)
        
















